Amprobe ACD-41PQ User Manual - Page 9

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●PF (Total Power Factor) displays simultaneously in the secondary mini display.

Denoting efficiency, absolute PF value is adopted.

●"A-lags" LCD annunciator turns on to indicate an inductive circuit, or Current A lags

Voltage V (i.e., phase-shift angle θ is "+").

On the contrary, together with significant PF values, WITHOUT "A-lags" turn on to

indicate a capacitive circuit, or Current A leads Voltage V (i.e., phase-shift angle θ is

"-").

Note:

1. When measuring load circuits with power absorptions as in most applications, positive

W (Real Power) readings indicate correct measurement setups. Negative readings (LCD

annunciator "-" turns on) indicate either the clamp-on jaws direction or the test leads

polarity is reversed in such cases. Correct the setups to get proper "A-lags" indications.

2. When encountering largely distorted waveforms, "A-lags" detection might be affected

due to the influence of harmonics. As mentioned, it is recommended to deal with (e.g.

filter out) harmonics before correcting phase-shift problems.

●Measuring One or Single Phase Power Parameters: